ROFINE基于以太网标准.pptVIP

* 8 Beispiele für Web-Services: FW-Update ohne Engineeringsystem, FAQ, Diagnose, Verdrahtungstest ohne Engineeringsystem / direkter Zugriff von MES-Systemen m?glich einfaches Handling, Plug and Play !? * 与普通的办公室网络和控制级的工业以太网不同,在现场级网络中传输的往往都是工业现场的I/O信号以及控制信号,从控制安全的角度来说,系统对这些来 自于现场传感器的I/O信号要能够及时获取,并及时做出响应,将控制信号及时准确地传递到相应的动作单元中,因此,现场级通信网络对通信的实时性和确定性有极高的要求。这也正是普通的工业以太网技术在现场级通信网络中难以和现场总线技术抗衡的重要原因。 * Created in 1989 by a consortium of companies and institutions, PROFIBUS has become the world’s most popular fieldbus in discrete manufacturing and process control. It is mature, proven technology that is ideal for supporting modern automation systems. With over 20 million installed devices, it is a significant driving force for the world’s production plants. By continuously enhancing the technology, PROFIBUS International has ensured that PROFIBUS remains the dominant fieldbus solution. The ongoing commitment of the world’s automation major suppliers ensures that investments today are fully protected for the lifetime of any plant. PROFIBUS is unique in offering a fully integrated solution for discrete and process applications, a major benefit in the process industries where upstream, mainstream and downstream processes have to work together. Industries using PROFIBUS range from critical petrochemical operations and high volume robotic manufacturing plants, right across the spectrum to food and drink, water/waste treatment plants * * * * Provider/Consumer concept compares with master/slave. from the point of view of communication, all profinet devices have equal privileges on the Ethernet. However, a type and a manner are be defined during configuration. First paragraph is ?T1, and second paragraph is ?T2, then the last one is ?T3. 1500+18+4=1522bytes, 1522*8/100M=0.12ms. So important time is for ?T2. T1取决于组件的结构 ，几乎与协议无关。T3取决于通信系统的结构，在高传输速度时候，不是要紧的参数。tcp/ip栈的延时时间高达200ms的范围，即使用最优化的udp/ip栈实现高效的协议，经过此栈每个周期所需要的协议处理时间大约为500us. * Time critical application such as RT, and “b